Dump-car.



R. M. ZIMMBRMAN.

DUMP OAR.

APPLIOATION FILED JULY 30, 1910.

Patented Mar. 26, 1912.

COLUMBIA PLANOORAPH co.. WASHINGTON. D. C.

R. M. ZIMMBRMAN.

DUMP OAR.

APPLICATION FILED JULY 30,1910.

3 SHEETS-SHEET 2.

COLUMBIA ILANOGRAPII C().,WASIIINGTON, u. c,

Patented Mar. 26, 1912.

R. M. ZIMMBRMAN.

DUMP OAR.

APPLICATION TILED JULY 30,1910.

Patented Mar. 26, 1912.

a sums-sum 3.

COLUMBIA PLANOGRAPH :0. WASHINGTON. D. c

I UNITED STATES PATENT OFFICE.

ROBERT MONTAGUE ZIMMERMAN, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TONATIONAL DUMP CAR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

DUMP-CAR.

Specification of Letters Patent.

Application filed July 30, 1910.

Patented Mar. 26, 1912.

Serial No. 574,681.

To all whom it may concern Be it known that I, ROBERT MONTAGUEZIMMERMAN, of the city of Montreal, Province of Quebec, Canada, haveinvented certain new and useful Improvements in Dump-Cars; and 1' dohereby declare that the following is a full, clear, and exact description of the same.

My invention relates particularly to the means for operating thedischarge doors of dump cars, and consists of the construction andcombination of parts hereinafter described and pointed out in theclaims. For full comprehension, however, of my invention reference mustbe had to the accompanying drawings forming a part of this specificationin which similar reference characters indicate the same parts andwherein F'gure 1 is a transverse vertical sectional view of a carconstructed according to my invention, Fig. 2 is a side elevation of oneend thereof partly broken away; and Fig. 3 is a plan view of theunderside of the car with the ends of the latter broken away.

The body of the car illustrated comprises a floor frame consisting of apair of side sills 6 end sills a longitudinal intermediate sills (Z, andauxiliary sills e and e situated transversely between the sills cl. Thesuperstructure carried by this floor frame comprises inclined end hopperwalls f and side walls consisting of vertical and inclined portions 9and h respectively, the longitudinal intermediate sills (Z and auxilarysills c having the hopper walls fastened thereto and forming the frameof the discharge opening of the car, the doors 2' and 7' being hinged asat 70 to the sills (Z, forming the sides of the discharge opening.

The door mechanism comprises longitudinal shafts Z and Z located beneaththe doors and which are adapted to travel up and down inclinedsupporting rails m to cause the doors to close or open, such rails beingarranged below the level of the car body and inclined upwardly towardthe center of the car, being secured to the car frame by bolts or rivetspassing through upwardly extending arms m formed integrally with therails. Secured to the underside of the doors are rails n which bear uponthe shafts Z. These rails have their main portions a inclined downwardlytoward the center of the car (considering the doors to be in closedposition as shown in full lines Fig. 1) and converging toward the railsm, while'portions 91 of each rail 12, adjacent to the inner edge of thedoors under which the shafts ride when the doors are approaching theirclosed position, are bent at an angle to the main portion and inclinedslightly upon and toward the inner edge of the doors to present adiminished angle of convergence to ward the rails m so that the shaftshave the effect of very acute angled wedges inserted between the tworails to hold the doors firmly closed.

A pair of levers are fulcrumed at their centers to a pair of brackets 1'suspended from the car frame a short distance beyond each end of thedoor frame in order to be located out of the path of the doors, the saidfulcrum points being below the level of the abutting edges of the doorswhen the latter are closed. The opposite ends of these levers areoperatively connected to the shafts Z by links 8 and s of channelcrosssection.

The shafts are reciprocated laterally on the rails m by an oscillatoryshaft 15 supported on bearing brackets a secured to one side of thebottom of the car, and having rigidly mounted thereon a pair of crankarms v connected to the opposite ends of the shafts 79 by pitmen to alsoof channel crosssection.

The oscillatory shaft 15 is operated by a lever .01 fulcrumed to themiddle portion thereof and carrying a weighted operating pawl 7 engaginga ratchet wheel 2 rigidly mounted upon such shaft. while a detent pawl2, carried by a bracket 3 secured to one of the bearing brackets it,engages a second ratchet wheel 4- (Figs. 2 and 3) rigidly mounted uponthe said shaft.

Operation: To close the doors the lever m is operated to turn the shaftt in the direction of arrow 10 which, by means of the lever arms andpitmen, pushes the shaft 1 sidewise up its inclined supporting rail andthereby causes the link s to lower one end of lever and the opposite endof such lever to draw link .9 upwardly and move the shaft Z to the upperend of its inclined supporting rail thus closing the doors the shaftsbecoming wedged between the converging surfaces of the portions n of therails on the doors and the rails m. To open the doors the shaft isturned in the opposite direction by the lever 423 thus releasing theshafts Z Z from their position wedged between the rails and permittingthe doors to be precipitated to their full open position.

lVhat is claimed is as follows 1. In a dump car, the combination with apair of doors, of door operating mechanism comprising a lever, a pair oflaterally movable shafts upon which the doors rest freely, linksoperatively connecting the shafts to the lever, means through which theshafts act upon the doors, and reciprocatory means operatively connectedto one of. the said shafts. A

2. In a dump car, the combination with a pair of doors, of dooroperating mechanism comprising a lever fulcrumed between its ends, apair of laterally movable door supporting members upon which the doorsrest freely, links operatively connecting the opposite ends of the leverto the members, means through which the members act upon the doors andreciprocatory means operatively connected to one of the said members.

3. In a dump car, the combination with a pair of doors, of dooroperating mechanism comprising a lever fulcrumed below the level of theabutting edges of the doors when the latter are closed and out of thepath of such doors; a pair of laterally movable shaf-ts supporting thedoors; links operatively connecting the opposite ends of the lever tothe shafts, and means whereby the said mechanism is operated.

4. In a dump car, the combination with a pair of doors, of dooroperating mechanism comprising a lever fulcrumed below the level of theabutting edges of the doors when the latter are closed and out of thepath of such doors, a pair of laterally movable shafts supporting thedoors, links operatively connecting the opposite ends of the lever tothe shafts, reciprocatory operating mechanism, and a pitman connectingthe reciprocatory mechanism to one of the shafts.

5. In a dump car, the combination with a pair of doors, of dooroperating mechanism comprising a lever fulcrumed below the level of theabutting edges of the doors when the latter are closed and out of thepath of such doors; a pair of laterally movable shafts supporting .thedoors; links op eratively connecting the opposite ends of the lever tothe shafts, an oscillatory shaft; a crank arm rigidly mounted on thelast mentioned shaft, and a pitman operatively connecting the crank armto one of the said laterally movable shafts.

6. In a dump car, the combination with a pair of doors, of dooroperating mechanism comprising a lever fulcrumed between its ends thefulcrum being located in the longitudinal center line of the car andbelow the level of and out of the path of the said doors, downwardlyinclined rails fixed to the undersides of the doors, upwardly inclinedrails fixed to the frame of the car, a pair of laterally movable dooroperating shafts having the first mentioned rails resting thereon andsuch shafts being supported by the last mentioned rails, linksoperatively connecting the opposite ends of the lever to the shafts, anoscillatory shaft, a pair of crank arms rigidly mounted on such shaft,pitmen attached at one end to one of the laterally movable shafts andpivotally connected at their opposite ends to the crank arms, and meansfor operating the oscillatory shaft.

7 In a dump car, the combination with a pair of doors, of door operatingmechanism comprising a lever fulcrumed below the level of the abuttingedges of the doors when the latter are closed and out of the path ofsuch doors; a pair of laterally movable shafts supporting the doors;links operativel con necting the opposite ends of the lever to theshafts, and reciprocatory means operatively connected to one of theshafts.

8. In a dump car, the combination with a pair of doors presenting railson the underside thereof, of door operating mechanism comprising a leverfulcrumed between its ends the fulcrum being located in the longitudinalcenter line of the car and below the level of and out of the path of thesaid doors, rails fiXed to the frame of the car; a pair of laterallymovable door operating shafts having the first mentioned rails restingthereon and such shafts being supported by the last mentioned rails;links operatively connecting the opposite ends of the lever to theshafts; an oscillatory shaft; a pair of crank arms rigidly mounted onsuch shaft; pitmen attached at one end. to one of the laterally movableshafts and pivotally connected at their opposite ends to the crank arms;and means for operating the oscillatory shaft.

9. In a dump car, the combination with a pair of doors, of mechanism foroperating one of the doors including a laterally movable membersupporting the said door, means independent of the operating mechanismfor supporting the said laterally movable member, a lever fulcrumedbetween its ends, means operatively connecting one end of such lever tothe said door operating mechanism and means operatively connecting theother end of the lever to the other door.

10. In a dump car, the combination with a pair of doors and a pair oflaterally movable door supporting members upon. which the doors freelyrest of mechanism for operating one of the door supporting mem bers, alever fulcrumed between its ends, a link connecting the said operateddoor supporting member to one end of the lever, and

such shafts, means for operating one of such shafts, and means wherebysuch shaft operates the other.

12. In a dump car, the combination with a pair of doors, of dooroperating means comprising a pair of laterally movable members locatedbeneath the doors and upon which the doors freely rest, means throughwhich such members act upon the doors, 15

means for operating one of the said laterally movable members, and meansoperatively connecting the said members together.

In testimony whereof, I have signed my name to this specification, inthe presence 20 of two subscribing Witnesses.

ROBERT MON'lAGUE ZIMMERMAN.

Witnesses:

STANLEY G. KING, JOHN A. OKEEFE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, D. G.

